HARTFORD prefixes in area code 959
NANPA records 38 assigned NXX blocks to rate center HARTFORD in area code 959, 23.2% of the 164 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 21 holders hold those blocks, the largest being ONVOY, LLC - CT (7), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (6), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (4). The earliest assignment on record here is 2014-09-18 and the most recent 2026-10-28. 38 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 234, 262, 269, 270 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 959-200 | Lumen CENTURYLINK COMMUNICATIONS, LLC | 2014-09-18 | yes | yes |
| 959-204 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2018-07-06 | yes | yes |
| 959-205 | EXIANT COMMUNICATIONS LLC | 2019-09-09 | yes | yes |
| 959-206 | Vonage VONAGE AMERICA LLC | 2018-12-06 | yes | yes |
| 959-221 | IP HORIZON LLC | 2021-04-01 | yes | yes |
| 959-223 | HD CARRIER LLC | 2021-04-06 | yes | yes |
| 959-230 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT | – | yes | yes |
| 959-236 | Dish BOOST SUBSCRIBERCO L.L.C. | 2021-12-09 | yes | yes |
| 959-240 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 2022-12-06 | yes | yes |
| 959-248 | NUSO, LLC | 2023-03-10 | yes | yes |
| 959-255 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | yes | yes |
| 959-256 | Onvoy ONVOY, LLC - CT | 2023-09-06 | yes | yes |
| 959-257 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2023-09-21 | yes | yes |
| 959-258 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | 2024-01-11 | yes | yes |
| 959-259 | Onvoy ONVOY, LLC - CT | 2024-01-25 | yes | yes |
| 959-262 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2024-03-14 | yes | yes |
| 959-273 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2025-01-30 | yes | yes |
| 959-274 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2025-02-26 | yes | yes |
| 959-276 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2025-06-05 | yes | yes |
| 959-278 | Dish BOOST SUBSCRIBERCO L.L.C. | 2025-08-06 | yes | yes |
| 959-279 | WAVENATION, LLC | 2026-01-29 | yes | yes |
| 959-280 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 2026-01-23 | yes | yes |
| 959-282 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2016-11-16 | yes | yes |
| 959-287 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2026-10-28 | yes | no |
| 959-299 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 2015-03-27 | yes | yes |
| 959-333 | Telnyx TELNYX LLC | 2017-02-24 | yes | yes |
| 959-529 | FRACTEL, LLC | 2020-07-21 | yes | yes |
| 959-599 | SKYE TELECOM LLC DBA SKYETEL | 2021-09-14 | yes | yes |
| 959-666 | Onvoy ONVOY, LLC - CT | 2017-10-03 | yes | yes |
| 959-710 | Charter ONVOY SPECTRUM, LLC | 2019-09-17 | yes | yes |
| 959-777 | Onvoy ONVOY, LLC - CT | 2015-01-27 | yes | yes |
| 959-867 | COMMIO, LLC | 2019-06-14 | yes | yes |
| 959-876 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 2020-09-14 | yes | yes |
| 959-888 | Onvoy ONVOY, LLC - CT | 2015-01-27 | yes | yes |
| 959-895 | Twilio TWILIO INTERNATIONAL, INC. | 2020-10-14 | yes | yes |
| 959-900 | TERRA NOVA TELECOM INC. | 2018-12-19 | yes | yes |
| 959-997 | Onvoy ONVOY, LLC - CT | 2026-07-24 | yes | yes |
| 959-999 | Onvoy ONVOY, LLC - CT | 2014-10-03 | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| ONVOY, LLC - CT | Onvoy | 7 | 18.4% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | Verizon | 6 | 15.8% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CT | AT&T | 4 | 10.5% |
| NEW CINGULAR WIRELESS PCS, LLC - DC | AT&T | 3 | 7.9% |
| BOOST SUBSCRIBERCO L.L.C. | Dish | 2 | 5.3% |
| CENTURYLINK COMMUNICATIONS, LLC | Lumen | 1 | 2.6% |
| EXIANT COMMUNICATIONS LLC | – | 1 | 2.6% |
| VONAGE AMERICA LLC | Vonage | 1 | 2.6% |
| IP HORIZON LLC | – | 1 | 2.6% |
| HD CARRIER LLC | – | 1 | 2.6% |
| NUSO, LLC | – | 1 | 2.6% |
| OMNIPOINT COMMUNICATIONS, INC. - CT | T-Mobile | 1 | 2.6% |
| WAVENATION, LLC | – | 1 | 2.6% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 2.6% |
| TELNYX LLC | Telnyx | 1 | 2.6% |
| FRACTEL, LLC | – | 1 | 2.6% |
| SKYE TELECOM LLC DBA SKYETEL | – | 1 | 2.6% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 2.6% |
| COMMIO, LLC | – | 1 | 2.6% |
| TWILIO INTERNATIONAL, INC. | Twilio | 1 | 2.6% |
| TERRA NOVA TELECOM INC. | – | 1 | 2.6% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to HARTFORD in area code 959?
38 blocks: 200, 204, 205, 206, 221, 223, 230, 236, 240, 248, 255, 256 and 26 more, all listed in the table above.
Which carriers have numbers in HARTFORD?
ONVOY, LLC - CT (7 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (6 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (4 blocks), NEW CINGULAR WIRELESS PCS, LLC - DC (3 blocks), BOOST SUBSCRIBERCO L.L.C. (2 blocks), CENTURYLINK COMMUNICATIONS, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is HARTFORD a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.